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Power Strokes
7.3 Tech
2002 7.3 making tapping/knocking sound as rpms go up
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[QUOTE="jtgf250, post: 1221586, member: 16674"] Buddy dropped his truck off for me to look at. Said he was driving down the road and the tapping/knocking sound just came out of no where. I ran a contribution test with AE and had a fault for injector #3 . Pulled valve covers and checked uvch connections. Unplugged each injector while running and no change it the tapping noise. Nothing standing out on the valves, rockers, or rods. Ran contribution test again after messing with harnesses and the faults cleared but noise still present. Plan on pulling back apart in the next day or so and checking condition of glowplugs and push rods and such. Icp was reading around 520-530 at idle and would go up to about 2600 getting on it going up the road. Icp % at about 9-10 at idle. Unplug icp and goes to default 750. Kinda scratching my head at this point. Seems like a mechanical issue at this point to me. No smoke while idling or driving. Had a little white/blue haze at first start this morning but cleared right away. Any help or ideas welcome. Thanks [/QUOTE]
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7.3 Tech
2002 7.3 making tapping/knocking sound as rpms go up
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